package cn.itcast.filters;

import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.annotation.Order;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.stereotype.Component;
import org.springframework.util.MultiValueMap;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * 网关自定义拦截器
 *
 * @Author mr.gao
 * @Date 2025/1/3 15:48
 */
@Component
@Order(-1)
public class AuthorizeFilter implements GlobalFilter {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //获取请求参数
        ServerHttpRequest request = exchange.getRequest();
        //获取参数中的 authorization 参数
        MultiValueMap<String, String> params = request.getQueryParams();
        //判断参数是否包含 authorization 参数
        String auth = params.getFirst("authorization");
        //判断参数值是否等于 admin
        if ("admin".equals(auth)){
            return chain.filter(exchange);
        }
        //拦截
        exchange.getResponse().setStatusCode(HttpStatus.FORBIDDEN);
        // // 4.2.结束处理
        return exchange.getResponse().setComplete();

    }
}
